Catalytic activity study of Nano -Schiff base complexes/Al2O3 system

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2024-11-07 DOI:10.1016/j.molstruc.2024.140669

Shorouk S. Zyn Elabeden, Sahar A. El-Molla, Magdy Shebl, Sameh G. Sanad, Mona A. Naghmash

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引用次数: 0

Abstract

Cobalt complexes of 4,6-bis[(1E)-N-(2-hydroxyethyl) ethanimidoyl] benzene-1,3-diol) and 4,6-bis [(1E)-N-benzylethanimidoyl] benzene-1,3-diol) ligands were successfully supported on nano alumina. Furthermore, the catalytic performance of these catalysts was evaluated by measuring of hydrogen peroxide decomposition. The catalysts were then examined using high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), N₂ adsorption-desorption analysis, Energy Dispersive X-ray Spectroscopy (EDX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). It's interesting to note that the loading Co-complexes on Al₂O₃ catalyst resulted in a notable advancement in the catalytic efficiencies compared with single Al₂O₃. However, many parameters influenced the catalytic activity were investigated as reaction temperature, the concentration of Co-complexes. Results denoted that 0.015 Co-complexes / Al₂O₃ have the highest catalytic activity and showed greater stability throughout the H₂O₂ decomposition process and is recyclable several times.

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纳米希夫碱配合物/Al2O3 系统的催化活性研究

成功地将 4,6-双[(1E)-N-(2-羟乙基)乙脒酰基]苯-1,3-二醇配体和 4,6-双[(1E)-N-苄基乙脒酰基]苯-1,3-二醇配体的钴配合物支撑在纳米氧化铝上。此外，这些催化剂的催化性能还通过测定过氧化氢的分解得到了评估。然后使用高分辨率透射电子显微镜 (HR-TEM)、扫描电子显微镜 (SEM)、N2 吸附-解吸分析、能量色散 X 射线光谱 (EDX)、X 射线衍射 (XRD) 和傅立叶变换红外光谱 (FTIR) 对催化剂进行了检测。值得注意的是，与单一 Al2O3 相比，在 Al2O3 催化剂上负载 Co-络合物显著提高了催化效率。然而，影响催化活性的参数很多，如反应温度、钴络合物的浓度等。结果表明，0.015 Co-络合物/Al2O3 的催化活性最高，在整个 H2O2 分解过程中表现出更高的稳定性，并可多次循环使用。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.